Mom's Best Recipes
Recipe

Slow Cooker Pork Loin

A juicy, sliceable pork loin with a garlicky herb rub and a no-drama gravy made from the slow cooker drippings.

Author By Matt Campbell
4.8
Sliced slow cooker pork loin on a cutting board with herbs and a small pitcher of gravy nearby
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Slow cooker pork loin gets a bad rap because it can go from tender to dry if you treat it like pork shoulder. But when you give it a little help in the flavor department and cook it to the right temperature, you get what we all want on a weeknight: cozy, savory slices that feel like you did more than you actually did.

This recipe keeps ingredients easy, instructions clear, and results very pause-mid-bite worthy. The move is a quick sear for crisp edges and deeper flavor, then a slow simmer on top of onions with broth and a hit of acid so the meat stays bright and the drippings turn into a legit gravy. Also, if your day is chaotic, this is the kind of chaotic that cooks itself.

Raw pork loin roast with small bowls of seasonings and a measuring cup of broth

Why It Works

  • Juicy, sliceable pork: Pork loin is lean, so we cook it gently and pull it when it hits 145°F, then rest before slicing.
  • Flavor that actually shows up: A garlicky herb rub plus a quick sear gives you browned edges and a roast-like vibe without turning on the oven.
  • Built-in gravy: The onions and broth create drippings with body. A fast cornstarch slurry turns it into a silky gravy in minutes.
  • Flexible timing: Works on LOW or HIGH, and leftovers are excellent for sandwiches, rice bowls, and meal prep.

Pairs Well With

Recommended

Slow Cooker Pork Roast

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A cozy slow cooker pork roast with vegetables and an easy pan-free gravy. Fork-tender, low effort, and weeknight friendly.

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Crock Pot Pork Tenderloin

Crock Pot Pork Tenderloin

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Storage Tips

Refrigerate: Store sliced pork loin in an airtight container with a little gravy or cooking liquid to keep it moist. Refrigerate up to 4 days.

Freeze: Freeze slices in a freezer bag with a few spoonfuls of gravy, pressed flat for quick thawing. Freeze up to 3 months.

Reheat without drying out: Warm gently in a covered skillet with a splash of broth or gravy over low heat, or microwave in short bursts with a damp paper towel on top. Avoid blasting it until it is aggressively steaming.

Leftover sliced pork loin in a glass storage container with gravy

Common Questions

Is pork loin the same as pork tenderloin?

Nope. Pork tenderloin is smaller and very lean, and it cooks faster. Pork loin is larger and roast-like. This recipe is written for a pork loin roast (about 2.5 to 3.5 pounds).

Do I have to sear the pork loin first?

You do not have to, but I strongly recommend it. A 3 to 4 minute sear per side adds flavor and gives you those crisp edges that make slow cooker meat taste less boiled.

What temperature should pork loin be?

Cook the thickest part to 145°F, then let it rest at least 3 minutes (I like 10 to 15 for juiciness and easier slicing). In other words, 145°F is the target temperature in the meat, not a vague vibe.

Where do I put the thermometer?

Stick it into the center of the thickest part of the loin. Try not to touch the bottom of the slow cooker or a fatty edge, since that can throw off the reading.

How long should I cook pork loin in a slow cooker?

Timing is a guideline. Temperature is the rule. For a 2.5 to 3.5 lb loin in a 6-quart slow cooker, it is usually 3 to 5 hours on LOW or 2 to 3 hours on HIGH. Some slow cookers run cool, some loins are thicker, and a cold-from-the-fridge roast can take longer. Start checking early and keep checking until it hits 145°F.

Is 145°F safe for pork?

Yes. USDA guidance for whole cuts of pork is 145°F with a 3 minute rest.

Why is my pork loin dry?

Almost always overcooking. Pork loin is lean and it does not reward overtime. Resting matters too. Liquid in the cooker is great for flavor and gravy, but it is not a magic shield against dryness if the meat goes past temp.

Should I tie the roast?

If your loin is uneven or sort of flat on one end, yes. A few loops of kitchen twine help it cook more evenly and slice more neatly. If it is already a nice, uniform tube, you can skip it.

Do I need to trim anything?

If you see silverskin (that shiny, tough strip), trim it off if you can. A thin fat cap is fine. It adds flavor and helps protect the meat.

Can I add potatoes and carrots?

Yes. Add baby potatoes and thick carrot chunks under and around the pork (they cook best closer to the bottom). You may need a little extra cook time, but still cook the pork to temperature, not by the clock.

What if my gravy is too thin or too thick?

Too thin: simmer a little longer and add more slurry in small splashes (mix cornstarch with cold water first). Too thick: whisk in a bit more broth or cooking liquid until it loosens up.

Can I use pork loin chops?

I would not for this method. Chops are thinner and will overcook quickly in a slow cooker. Save them for a quick skillet dinner.

I used to think slow cooker pork loin was always going to taste like something you ate politely and then immediately forgot. Then I started treating it like a roast that just happens to finish in a crock. Quick sear, serious seasoning, onions underneath like a little flavor mattress, and a gravy that feels like you cheated. Now it is one of my favorite I-have-zero-time-but-still-want-dinner-to-feel-like-dinner meals.